Well, I have enabled the default captcha for com_content.
I want to allow public comments and they should get the captcha. Registered users should be able to comment without getting the captcha.

So I enabled the captcha in the content settings and acivated it for the usertypes public (öffentlich), let it out for all other usertypes.

Now if someone wants to comment without being logged in to the page the captcha shows up, but it also shows up when I'm logged in to the page and want to comment.

Any ideas what I missed out?